David Estrada, a police spokesman, said the woman suffered a leg injury and the girl had minor cuts on her hands.

The relationship between the woman and the girl was not immediately clear.

The two were rushed to Boston hospitals, along with two other people involved in the accident.

Their condition also was not known Monday night.

The victims were taken to Boston Medical Center and Brigham and Women’s Hospital, said a spokesman for Boston Emergency Medical Services.

Estrada said witnesses indicated that one driver ran a red light and struck another vehicle that was in the middle of the intersection. One of those vehicles was pushed onto the sidewalk and struck the woman and the girl.

Two badly damaged vehicles remained visible at the scene around 5 p.m.

Police were directing traffic on Tremont Street, a busy thoroughfare, while investigators examined the wreckage.

Ray Sena, 42, of Waltham, said he was across the street at the Whittier Street Health Center and witnessed the first part of the crash.

He said a gray car was attempting to turn left on Tremont Street when it collided with another vehicle.

He said the gray vehicle spun out and struck a large pole on Tremont, where the woman and the girl had been.

“They looked like they were banged up pretty bad,” Sena said.

It was not immediately clear whether anyone would face criminal charges or citations following the crash, which remained under investigation Monday night.